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Updated: Aug 31, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications
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复合元原子使得超紧的多带光学操纵成为可能

Yechuan Zhu, Siwen He, Yuxiang Lan

    Optics letters
    |November 1, 2024
    PubMed
    概括

    这项研究引入了一种新型的复合金属,能够同时聚焦可见光和中红外光. 这一突破使先进的光学设备具有多频段操纵能力.

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    相关概念视频

    ¹H NMR: Long-Range Coupling01:27

    ¹H NMR: Long-Range Coupling

    The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
    In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.